Tie down



FIG. 1 is a front top right perspective view of a tie down showing our new design;

FIG. 2 is a front top left perspective view thereof;

FIG. 3 is a front bottom right perspective view thereof;

FIG. 4 is a front bottom left perspective view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a left side view thereof;

FIG. 8 is a top side view thereof; and,

FIG. 9 is a bottom side view thereof.

The broken lines in the drawings depict portions of the tie down that form no part of the claimed design. 

CLAIM The ornamental design for a tie down, as shown and described. 